FC 4 Networking bridge

[Tod Merley]

Reply below:

Date: Sat, 28 Jan 2006 07:03:23 +0000
> From: Mark <mark at lumison.net>
> Subject: FC 4 Networking bridge
> To: For users of Fedora Core releases <fedora-list at redhat.com>
> Message-ID: <43DB173B.3030700 at lumison.net>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> Hi all
>
> Perhaps I am being a lil dim here as a new linux sysadmin personage
> (previous preference was for windows, emphasis on "was")
>
> For some reason I have not been able to get a working network along the
> following lines.
>
> NOTE this network is purely for systems testing, bandwidth etc, hence
> the daisy chain effect.
>
> I have 2 servers, both running FC4 and a cisco router.
>
> The aim is to test throughput from one server to the other via the cisco.
>
> My proposed solution is as follows:
> Both servers have 2 gigE nics
> Cisco has 2 interfaces which I have named ciscoLan and ciscoWan
>
> Basically I want server 1 with eth0 connected to my DMZ network (and the
> world at large) witha  public IP address
> I then want to configure eth1 with another public IP to connect directly
> to the ciscoWan
>
> I already have the cisco connected via ciscoLan to server 2 using NAT
> and private IPs but I cannot get eth1 on server 1 to come up with the IP
> address I need and then talk to the cisco.
>
> I think the issue may be that I need to enable bridging of sorts between
> the 2 NICs, as MS does with ICS etc.
>
> So the question is, how do I acheive that?
>
> As far as I can tell, I have all the interfaces configured correctly.
>
> I can`t give the actual IPs here, but I will give an example:
> All Xs give the same subnet
>
> Server 1
> /etc/sysconfig/network
> NETWORKING=yes
> HOSTNAME=test-server-01.domain.net
> GATEWAY=X.X.X.33
>
> /etc/sysconfig/network-scripts/ifcfg-eth0
> DEVICE=eth0
> BOOTPROTO=none
> HWADDR=00:14:22:22:04:1A
> ONBOOT=yes
> TYPE=Ethernet
> IPADDR=X.X.X.41
> NETMASK=255.255.255.224
> GATEWAY=X.X.X.33
>
> /etc/sysconfig/network-scripts/ifcfg-eth1
> DEVICE=eth1
> HWADDR=00:14:22:22:04:1A
> ONBOOT=yes
> TYPE=Ethernet
> NETMASK=255.255.255.224
> IPADDR=X.X.X.42
> GATEWAY=217.30.126.33  <- is this a problem????
>
> Have I really missed something and thats why this server can`t talk to
> my cisco on eth1?  By the way, the cisco has an IP of X.X.X.62
>
> I am trying to have both eth0 and eth1 having IPs only 1 apart and the
> gateway for eth1 is set to the same as eth0.  Is this adding to the
> problems?
>
> I can solve it fairly easily by installing windows on server 1 and
> configure ICS etc, but I would rather avoid that for 2 reasons:
> - having FC4 on the server is beneficial for us after this roject
> - I don`t want to give in to this problem, I would rather solve it.
>
> Thanks in advnace.
>
> Mark
> --
>
Hi Mark,

Not a real expert here but I think iptables is where you need to look.  Do
a:

man iptables

also you might look into
www.yolinux.com/TUTORIALS/LinuxTutorialiptablesNetworkGateway.html

Have fun!

Tod
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